Make sentences paying attention to the comments in brackets. 1) travis / buy a car. (plan) 2) vivian / have lunch with her best friend. (arrangement) 3) timothy / play tennis tomorrow at 5pm. (arrangement) 4) lora / go shopping. (plan)

Present Continuos употребляем для запланированных действий и при
наличии договоренности с кем-либо.

Be going to употребляем когда хотим выразить  личное намерение осуществить какое-то действие.

1) Travis IS GOING TO buy a car. (plan)

2) Vivian IS HAVING lunch with her best friend. (arrangement)

3) Timothy IS PLAYING tennis tomorrow at 5pm. (arrangement)

4) Lora IS GOING TO go shopping. (plan)